Transmission-gear.



M. L. 'R. HOWALD & J. M. MOGEOBGE.

TRANSMISSION GEAR.

APPLIUATION FILED JULY 6,1907.

Patented Feb. 23, 1909.

2 SHEETSSHEET 1.

V with mus,

M. L. R. HOWALD 8: J. M. MOGEORGE.

TRANSMISSION GEAR. APPLICATION FILED JULY 6, 1907.

91 3,503. Patented Feb. 23, 1909. 2 SHEETS-SHEET 2. I 7 I m 12 J0 J5- IZ5 Z0 Z5 8 vwz Mio'a J M17. F2 How 262 I/Vi h: oozes UNITED STATESPATENT OFFICE.

MELVILLE L. R. HOWALD AND JAMES M. MCGEORGE, OF SALEM, OHIO.

TRANSMIS SIGN-GE AR.

Patented Feb. 23, icon.

Application filed Julylfi, 1907. Serial No. 382,560.

To all whom it may concern:

Be it known that I, MELVILLE L. R. How ALD and JAMES M. MoGnoRGn,citizens of the United States, residing at Salem, in the county ofColumbiana and State of Ohio, have invented certain new and usefulImprovements in T ransmission-Gears, of which the following is aspecification.

This invention relates to gearing, and more particularly to transmissiongears, and has for its object to provide a transmission gear of thefriction type which may be shifted to vary the speed of the driven shaftand which will include means for throwing the disks out of operativerelation.

Another object is to provide means for idling the drive chains when theparts are out of gear.

Other objects and advantages will be apparent from the followingdescription and it will be understood that changes in the specificstructure shown and described may be made within the scope of the claimswithout de arting from the spirit of the invention.

11 the drawings forming a portion of this specification, and in whichlike characters of reference indicate similar arts in the several views,Figure 1 is a top p an of a portion of an automobile chassis; the1present transmission gear being mounted t ereupon; Fig. 2 is a sideelevation of the gear frame; Fig. 3 is a horizontal section on line 3-3of Fig. 2 taken through the split shaft and the stub shafts; Fig. 4 is arear elevation. Fig. 5 is a detail view showing one of the idlersengaged with the sprocket chain.

Referring now to the drawings, the present transmission gear includes aframe 5, rectangular in top plan, which is designed to be disposedtransversely of the automobile in which it is used, as shown in Fig. 1.The frame includes a forward member 6, end

' members 7 and a rear member 8 and a supplemental front member 9 issecured longitudinally within the frame in parallel relation to themember 6 and spaced therefrom.

A central drive shaft 10 is journaled at one end in the two members 6and 9 between the ends thereof and extends inwardly of the member 9where it carries a spur gear Wheel 11, and stub shafts 12 are journaledin the members 6 and 9 at opposite sides of the shaft 10, extendinginwardly of the member 9 and carrying friction disks 13 having theirfriction faces directed rearwardly, and provided with outwardlyextending peripheral gear teeth 14 meshing with the spur gear wheel 11.

A central brace member 14 extends between the front and rear members ofthe frame at the lower portions thereof and mounted in the frame thereare a plurality of brackets 15, arranged in longitudinal series andpivoted for movement toward and away from the friction disks 13, thesebrackets being connected at their upper ends by a rod 16. The centralbracket, indicated at 15, is bifurcated and receives in its bifurcation,the brace member 14, to which it is pivoted, the other brackets beingpivoted to the end members 7. Two coaxial shafts, 17 and 18 arejournaled in the brackets above their pivot points, the bracket 15receiving the inner ends of these shaft sections, while the outer endsthereof are extended outwardly through the outer brackets 15, and upontheir outer ends, these shaft sections have drive sprockets 19 securedthereto. Between the brackets, the shaft sections are squared, andmounted upon each of these squared portions, there is a friction wheel20, these wheels being arranged for engagement of their peripheriesagainst the faces of the disks 13 and being movable upon the shaftsections, diametrically of these disks to vary the speed, as will bereadily understood, and it will be observed that through movement of thebrackets, the wheels may be brought into and out of engagement with thedisks.

Upwardly extending ears 7 are carried by the rearward portions of theends 7 of the frame, and in these cars there is slidably mounted a shiftrod 21, carrying yokes 22 embracing the wheels 20 for movement of thelatter upon their respective shaft sections simultaneously.

It will be understood that suitable operating levers A and B areprovided for movement of the brackets 15 and the shift rod 21, andidlers C are provided for the sprocket chains D engaged with the srockets 19, and are so arranged that when t 1e sprockets are movedrearwardly which would tend to loosen the chains, the latter will beengaged by the idlers and held taut thereby, to prevent theirdisengagement from the sprockets.

WVhat is claimed is:

1. In a transmission gear, the combination with friction disks, of twocoaxial shafts mounted for movement toward and away from the disks,friction wheels mounted for sliding movement upon the shafts, over thefaces of the friction disks, means for moving the shafts, and means formoving the wheels.

2. In a transmission gear, the combination with friction disks, of twocoaxial shafts, and friction wheels mounted upon the shafts for rotationtherewith and for sliding movement thereupon, said shafts being movableto bring the wheels into and out of engagement with the disks.

3. In a transmission gear, the combination with friction disks, ofshafts movable toward and away from the friction disks, friction wheelscarried by the shafts and arranged for movement therewith into and outof engagement with the friction disks, sprockets carried by the shafts,drive chains connected with the sprockets, and idlers arranged formovement to take up slack in the chains when the shafts are moved tobring the friction Wheels out of engagement with the friction disks.

4. In a transmission gear, the combination with a frame, of a driveshaft j ournaled in the frame, a spur gear wheel carried by the shaft,friction disks mounted in the frame at opposite sides of the shaft andhaving gear teeth meshing with the spur gear Wheel, brackets pivoted inthe frame, two coaxial shafts journaled in the brackets, friction wheelsmounted upon said shafts for movement longitudinally thereupon, andmeans for moving the wheels, said brackets being movable upon theirpivots to bring the wheels into and out'of engagement with the disks.

In testimony whereof we affix our signatures, in presence of twowitnesses.

MELVILLE L. R. HOWALD. JAMES M. McGEORGE.

lVitnesses:

D. J. HANNA, E. E. HANNA.

